Milestone 2: module/model docs (MD, Sphinx RST, PDF) and work log

74 source modules documented with extracted signatures, JSDoc params,
imports, and call graphs. 10 first-class models (PriceRule through
StatusResponse) have their own MD/RST/PDF. Sphinx HTML builds from
docs/sphinx. Per-module PDFs in docs/modules-pdf and docs/models-pdf.

Middleware gates 2–6 and 10 pass on MOCK_VERAE without NATS.

Learned: RST includes are relative to the RST file; keep one PDF per
module; Add Numbers remains the only push required tomorrow.

docs/sphinx/models/AddNumbersResult.md

@@ -0,0 +1,25 @@
+# AddNumbersResult
+
+**Kind:** Zapier create output  
+**Defined in:** `packages/verae-activate/creates/add_numbers.js`
+
+## Fields
+
+| Field | Type | Meaning |
+|-------|------|---------|
+| `number1` | `number` | First addend (finite) |
+| `number2` | `number` | Second addend (finite) |
+| `sum` | `number` | number1 + number2 |
+| `mode` | `'local' | 'hosted'` | local = Zapier cloud arithmetic; hosted = POST /v1/add |
+
+## Who constructs it
+
+perform(z, bundle) → single object (creates never return arrays)
+
+## Who consumes it
+
+`Zapier Add Numbers action`, `optional zappier POST /v1/add`
+
+## Related modules
+
+See `docs/modules/` for the functions that take these types as parameters and the values they return.